Joint Spectrum estimation of Polarization and Space

The Joint Spectrum of Polarization and Space is constructed for the first time, which can depict the EM signal more completely. Based on the polarization sensitive antenna array, the joint spectrum is defined and the analytic function of joint spectrum is presented by MUSIC method. The discrimination power of joint spectrum is discussed theoretically in details. The polarization domain does not provide the same resolution capabilities as the other domains, when exploited alone. The simulations verify the superiority of the joint spectrum and coincide with the theoretical analysis. It is shown that the joint spectrum outperforms the spatial spectrum in characteristic detection and estimation.